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Effect of quizalofop-p-ethyl (elegant) on control of grassy weeds and its impact on soybean yield (Glycine max L.) Singh V. Pratrap*, Pratap Tej, Bisht Neema, Akshita, Abnish Department of Agronomy, G.B. Pant University of Agriculture & Technology, Pantnagar-263 145, Uttarakhand, India *E-mail: vpratapsingh@rediffmail.com
Online published on 30 November, 2019. Abstract A field experiment was conducted at Norman E. Borlaug, Crop Research Center of GBPUA&T Pantnagar during kharif 2010 and 2011 to assess the efficacy of different doses of quizalafop-p-ethyl against the predominant grassy weeds in soybean crop. The experiment was laid out in Randomized Block Design (RBD) with seven treatments in three replications. All weed control treatments significantly reduced the density and dry matter accumulation of weeds resulting in significant increase in soybean yield over check (control). The maximum suppression in density as well as dry matter accumulation of weeds and highest weed control efficiency (WCE) were obtained with quizalafop- pethyl (elegant) applied as post emergence @ 100 and 200 g ha−1 and they were comparable with hand weeding (20 & 40 DAS). Manual hand weeding at 20 and 40 DAS resulted to the highest yield 2415 and 2563 kg ha−1 during 2010 and 2011 respectively followed by quizalafop-p-ethyl (elegant) @ 200 g ha−1 2350 and 2479 kg ha−1 during 2010 and 2011 respectively and quizalafop-p-ethyl (elegant) @100 g ha−1 (2325 in 2010 and 2459 kg ha−1 in 2011). Further, the highest benefit cost ratio 1.4 and 1.6 and net return Rs 18540 and 25557 ha−1 during 2010 and 2011 were obtained with application of quizalofop-p-ethyl market sample (MS) at 50 g ha−1 in 2010 and quizalofop-p-ethyl (elegant) at 100 g ha−1 in 2011 indicating its superiority over rest of the herbicidal treatments in respect to control the weeds. Top Keywords Soybean, weed control, herbicides, B C ratio. Top | |
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